Minimum potential energy for H on Pt(211) for geometry op- timized atom-surface distances Zopt on a (1×1) supercell. The energies are given relative to the most stable configuration of H on Pt(211) which is here near to the brg1 position (see Figure 5.2). Since our DFT calculations do not include spin-polarization, the corresponding highest adsorption energy of 3.74 eV for a single H atom should to our experience be overestimated by ∼ 0.7 eV. The contour line spacing is 0.03 eV.